Professor Coyle writes and teaches on aspects of legal and political philosophy. In 2004 his work won one of the SLS Prizes for Outstanding Legal Scholarship. His next book, From Positivism to Idealism, was shortlisted for the 2008 Inner Temple Book Prize. His third book, Dimensions of Politics and English Jurisprudence, was the subject of a conference at the University of Notre Dame, USA in 2013. In addition, he is the author of a student text, Modern Jurisprudence (2nd ed 2017). He is currently writing a book on natural law theory.
He has lectured and spoken at universities throughout the UK and elsewhere, including Emory University, LSE, UCL, and the Universities of Antwerp, Manchester and Minnesota.
At Birmingham, he is a member of the Jurisprudence research group, and is director of the Forum for the Study of Natural Law.